Why do we need restrictions on inverse trig functions

The video tutorial explains the concept of inverse functions and why some functions, like y = x^2, are not invertible without restrictions. It discusses the vertical and horizontal line tests to determine invertibility and how adding restrictions can make a function invertible. The tutorial uses the sine function as an example, showing how restricting its domain allows for an inverse to be found. The importance of these restrictions is emphasized to ensure functions are one-to-one and invertible.

Describe the process of reflecting a function about the line Y = X to find its inverse.

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What is the significance of the horizontal line test in determining if a function is invertible?

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Explain why the sine function fails the horizontal line test and what that implies for its invertibility.

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How do restrictions on the domain of a function affect its ability to have an inverse?

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What are the implications of not having a restriction when trying to find the inverse of a function?

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